Mainship 40 Trawler Single & Twin • Water Systems
9.2
Water System Components
Your boat is comprised of two systems Fresh Water and
Raw Water. The components that are used in each sys-
tem are broken down in this chapter. Their applications
and some use information can be found. The compo-
nents are as follows:
Fresh Water:
• Dockside Water Supply
• Fresh Water Tanks
• Fresh Water Fills and Vents
• Fresh Water Pump
•
Accumulator
• Water Manifold
• Wash Downs
• Water Heater
Raw Water:
• Intakes, Pickups or Seacocks
•
Strainers
• Raw Water Pump
• Air Conditioning Cooling Water (Option)
• Wash Down (Option)
9.1 Fresh Water System
9.1.1 Dockside Water Supply
When you are docked, you can connect a pressurized
dock water supply to your boat. A dockside water
supply will pressurize the boat’s water system without
using the water pump.
The dockside water inlet is on the transom above the
swim plateform. Connecting a portable (drinking) water
hose from a local water source to this inlet provides
water under pressure to the fresh water system without
using the pump.
Dockside water often comes from a municipal water
supply or similar sources which supplies water at a
higher pressure than the boat’s onboard system
pressure. The pressure regulator on the water inlet
reduces the pressure of the dockside supply to match
the boat system’s lower pressure.
This dockside water does not fill the water tanks.
Figure 9.1
Important: Always disconnect the dockside water supply
when you leave your boat unattended. A major leak or
break in the system could flood your boat. Excess water
in the bilge may sink your boat or flood the batteries
and engine. Your warranty does not cover this damage.
Note: Before you connect your boat’s water system
to the dockside water supply, make sure the dockside
water supply is suitable for drinking. Check with the
dockmaster to be sure.
To connect the dockside water inlet to your boat’s
water system:
1. Connect a garden hose to the dockside water supply.
2. Connect the other end of the hose to the dock side
water spigot.
3. Open the cold water faucet closest to the dock side
water inlet on the boat.
4. Open the dockside water supply spigot. As soon as a
steady stream of water comes out of the faucet on the
boat, close the spigot.
5. Check the boat’s water system for leaks. This
inspection is particularly important when you use the
dockside water hookup the first time.
The fresh water system is now ready for use.
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